Yuxuan Chen
b570122870
Fixes https://github.com/llvm/llvm-project/issues/188230 CoroAnnotationElide rewrites annotated safe calls to the `.noalloc` variant. The noalloc frame is caller-owned, but its `.resume` clone is shared with ordinary heap-allocated instances. With a `suspend_never` final suspend, normal resumption falls through to the `coro.free` deallocation path. Regular frontend cleanup has already run before this point. `coro.free` must therefore produce the frame pointer for a heap instance and null for a `.noalloc` instance. Use the frame destroy slot as a per-instance allocation tag. Cache its value at resume entry, before user code can resume and release the enclosing caller frame, then compare it with the cleanup clone. Replace each `coro.free` result with the frame pointer for a heap instance and null for an elided instance. Update the CoroSplit and Clang CodeGen checks to cover the conditional deallocation and the original suspend_never final-suspend shape. Assisted-By: Codex GPT 5.5 (cherry picked from commit b9e3e6546dcb4b33d023b7a336163d5650cda9d4)
C language Family Front-end
Welcome to Clang.
This is a compiler front-end for the C family of languages (C, C++ and Objective-C) which is built as part of the LLVM compiler infrastructure project.
Unlike many other compiler frontends, Clang is useful for a number of things beyond just compiling code: we intend for Clang to be host to a number of different source-level tools. One example of this is the Clang Static Analyzer.
If you're interested in more (including how to build Clang) it is best to read the relevant websites. Here are some pointers:
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Information on Clang: http://clang.llvm.org/
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Building and using Clang: http://clang.llvm.org/get_started.html
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Clang Static Analyzer: http://clang-analyzer.llvm.org/
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Information on the LLVM project: http://llvm.org/
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If you have questions or comments about Clang, a great place to discuss them is on the Clang forums:
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If you find a bug in Clang, please file it in the LLVM bug tracker: